improved out-of-date template

.github/ISSUE_TEMPLATE/out_of_date_package_report.md

@@ -7,8 +7,42 @@ assignees: ''
 
 ---
 
-**Project name**
-_give the name of the project_
 
-**Notify maintainers**
+###### Checklist
 
+<!-- Note that these are hard requirements -->
+
+<!--
+You can use the "Go to file" functionality on github to find the package
+Then you can go to the history for this package
+Find the latest "package_name: old_version -> new_version" commit
+The "new_version" is the the current version of the package
+-->
+- [ ] Checked the [nixpkgs master branch](https://github.com/NixOS/nixpkgs)
+<!--
+Type the name of your package and try to find an open pull request for the package
+If you find an open pull request, you can review it!
+You will probably have the new version of the package while helping the community!
+-->
+- [ ] Checked the [nixpkgs pull requests](https://github.com/NixOS/nixpkgs/pulls)
+
+###### Project name
+`nix search` name: 
+<!--
+The current version can be found easily with the same process than above for checking the master branch
+If an open PR is present for the package, take this version as the current one and link to the PR
+-->
+current version: 
+desired version: 
+
+###### Notify maintainers
+<!--
+Search your package here: https://search.nixos.org/packages?channel=unstable
+If no maintainer is listed for your package, tag the person that last updated the package
+-->
+
+maintainers: 
+
+###### Note for maintainers
+
+Please tag this issue in your PR.